Front Access Panels

I am about renovate an old row house in Baltimore so I'm kind of stuck with where the bathroom and the tub in particular are located. The tub is up against a brick wall and there is no way to access it from behind. Can anyone help me locate an access panel I can install that allows me to get to the plumbing from the tub side. I want to install this while I am re doing the walls just in case I have problems down the road.